Amsoil EA034 filter and Amsoil 5W30 Syn. here on both of my KJ's. Good for up to 25,000 miles between oil changes. It is never too late to switch to a good filter and good synthetic oil.

Last oil change I used valvoline synthetic blend (durablend) with a fram filter. I am hearing more bad things than good about fram, so I am thinking of using the purolater one next time (hearing good stuff about them). As far as oil, I wouldnt worry about using synthetics that late. I change my oil to synthetic at 65k (when i bought the jeep).

Do you all really leave that stuff in the jeep for 25k miles? Thats crazy.

I use Mobil 1 SYN and a Pure-One Purolater filter. I wouldnt pay that much for the amsoil stuff in the engine but I may use it in the tranny since these things suck for overheating and everything.

Hey what kind of oil filters are you guys using?

I have NAPA Gold on now (= Wix). I have used Mobil1, Motorcraft, and Baldwin. At almost 70k miles, '02 Sport.

Amsoil EA034 filter and Amsoil 5W30 Syn. here on both of my KJ's. Good for up to 25,000 miles between oil changes. It is never too late to switch to a good filter and good synthetic oil. I have over 180,000 miles on my XJ and she purrs like a kitten since switching to Amsoil 10W-30 and EA042 filter.

Hey! The Amsoil site told me 10W40 for the Libby. Why are you using 5W30?

Also, I plan to go about 10-12k per change (only 3K on the oil now). It'll work out to the same as 3k walmart specials

Interesting, as the earlier model years suggest 0w-30 - 10w-30 weights. Regardless, They will all work fine and I have been known to up the weight in the hot Summer months just for S's&G's. You might notice a little better mileage w/ 5w-30 though.

Edit: FWIW, I emailed Amsoil tech about the lack of other weights and longer interval oils for the 06 application guide. I will report back what i find out.